Interference cancellation for signals having the same radio-frequency carrier and transmitted at the same time

Abstract

Embodiments of wireless communication devices (WCDs) and methods for cancelling signal interference in the WCDs are generally described herein. Some of these embodiments describe a WCD that includes a receiver to generate a received signal, which includes at least a first signal transmitted to the WCD by a network station that operates in a full-duplex mode while the WCD operates in a half-duplex mode. The WCD also includes a module to generate an interference cancellation signal for the received signal based on interference information obtained from at least the received signal. The interference information is associated with a second signal transmitted to the network station by an additional device. The first signal is transmitted while the second signal is transmitted. The first and second signals include the same radio-frequency (RF) carrier.

1 - 24 . (canceled) 
     
     
         25 . A wireless communication device (WCD) comprising:
 a receiver to generate a received signal, the received signal including at least a first signal transmitted to the WCD by a network station operating in a full-duplex mode while the WCD operates in a half-duplex mode; and   a module to generate an interference cancellation signal for the received signal based on interference information obtained from at least the received signal, the interference information associated with a second signal transmitted to the network station by an additional device, wherein the first signal by the network station is transmitted to the WCD while the second signal by the additional device is transmitted, and the first and second signals include a same radio-frequency (RF) carrier.   
     
     
         26 . The WCD of  claim 25 , wherein the first signal includes a downlink signal transmitted by the network station to the WCD. 
     
     
         27 . The WCD of  claim 26 , wherein the second signal includes an uplink signal transmitted by the additional device to the network station. 
     
     
         28 . The WCD of  claim 25 , wherein the first signal includes a downlink signal transmitted by the network station to the WCD based on an orthogonal frequency division multiple access (OFDMA) communication technique. 
     
     
         29 . The WCD of  claim 25 , wherein the WCD is a half-duplex device, and the network station is arranged to transmit the first signal while the network station receives the second signal. 
     
     
         30 . The WCD of  claim 25 , wherein the module is arranged to:
 subtract the interference cancellation signal from the received signal to generate a resulting signal; and   decode the resulting signal to generate a data signal, the data signal including formation associated with the first signal from the network station.   
     
     
         31 . The WCD of  claim 25 , wherein the module is arranged to perform a successive interference cancellation operation to obtain the interference information. 
     
     
         32 . The WCD of  claim 25 , further comprising a half-duplex transceiver, wherein the receiver is part of the half-duplex transceiver. 
     
     
         33 . The WCD of  claim 25 , further comprising a full-duplex transceiver, wherein the receiver is part of the full-duplex transceiver. 
     
     
         34 . The WCD of  claim 25 , wherein the module is arranged to:
 generate a baseband signal based on a signal received by an antenna coupled to the receiver; and   generate a digital baseband signal based on the baseband signal, wherein the digital baseband signal includes the received signal.   
     
     
         35 . The WCD of  claim 34 , wherein the module is arranged to:
 demodulate the received signal to generate a demodulated signal;   decode the demodulated signal to generate a decoded signal; and   obtain the interference information based on the decoded signal.   
     
     
         36 . The WCD of  claim 25 , wherein the WCD includes one of a cellular telephone, a tablet computer, an e-reader, a notebook computer, and a personal digital assistant device. 
     
     
         37 . The WCD of  claim 25 , wherein the network station includes one of a base station and an enhanced node B (eNB). 
     
     
         38 . The WCD of  claim 25 , further comprising a transmitter to transmit a third signal to the network station, wherein the first and third signals include a same RF carrier. 
     
     
         39 . A method of operating a wireless communication device (WCD), the method comprising: generating an interference cancellation signal based at least in part on a received signal at a receiver of the WCD, the received signal including at least a first signal transmitted to the WCD by a network station, and the interference cancellation signal including information associated with a second signal transmitted by an additional device to the network station, wherein the first and second signals are transmitted during a same time interval, and the first and second signals include a same radio-frequency (RF) carrier; and
 subtracting the interference cancellation signal from the received signal.   
     
     
         40 . The method of  claim 39 , wherein generating the interference cancellation signal is performed as part of a successive interference cancellation operation. 
     
     
         41 . The method of  claim 39 , wherein generating the interference cancellation signal includes:
 demodulating the received signal to generate a demodulated signal;   decoding the demodulated signal to generate a decoded signal;   obtaining interference information from the decoded signal; and   generating the interference cancellation signal based on the interference information.   
     
     
         42 . The method of  claim 39 , further comprising:
 receiving a radio-frequency (RF) signal, wherein the WCD is in a half-duplex mode when the RF signal is received;   down-converting the RF signal to generate a baseband signal; and   generating a digital baseband signal based on the baseband signal, wherein the digital baseband signal includes the received signal.   
     
     
         43 . The method of  claim 39 , wherein the first signal includes a downlink signal and the second signal includes an uplink signal, and the WCD and the additional device are near each other, such that the downlink signal received by the WCD is interfered with by the uplink signal. 
     
     
         44 . The method of  claim 39 , wherein the WCD is incapable of simultaneously transmitting and receiving signals. 
     
     
         45 . The method of  claim 39 , wherein the WCD is capable of simultaneously transmitting and receiving signals. 
     
     
         46 . A computer-readable storage medium for storing information, which when executed, causes a wireless communication device (WCD) to:
 generate an interference cancellation signal based at least in part on a received signal at a receiver of the WCD, the received signal including at least a first signal transmitted to the WCD by a network station, and the interference cancellation signal including information associated with a second signal transmitted by an additional device to the network station, wherein the first and second signals are transmitted during a same time interval, and the first and second signals include a same radio-frequency (RF) carrier; and   subtract the interference cancellation signal from the received signal.   
     
     
         47 . The computer-readable storage medium of  claim 46 , wherein the first signal includes a downlink signal transmitted by the network station to the device, and the second signal includes an uplink signal transmitted by the additional device to the network station. 
     
     
         48 . The computer-readable storage medium of  claim 46 , wherein the WCD is incapable of simultaneously transmitting and receiving signals, and the network station is capable of simultaneously transmitting and receiving signals.